Onslaught FastCap Spider and Scorpion Insecticide

$54.95 - $396.32

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4.5 out of 5 stars Rating: 4.6

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Onslaught FastCap Spider and Scorpion Insecticide pint (16 oz)

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Onslaught FastCap Spider and Scorpion Insecticide - Gallon gallon (128 oz)

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Onslaught FastCap Spider and Scorpion Insecticide

Onslaught FastCap Spider and Scorpion Insecticide is an economic and easy to use formula that provides quick knockdown and long lived residual control of scorpions, spiders, and other insects listed on the label. This one of a kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. Onslaught FastCap Spider and Scorpion Insecticide can be applied in a number of areas both indoor and outdoor, as well as food areas (see label for complete list). This product is labeled for use as an indoor broadcast treatment.




Onslaught FastCap Spider & Scorpion Insecticide combines fast kill (action) and long residual activity against pests listed on this label when applied as surface or spot treatments, injected into wall voids, or as a crack and crevice spray in and around residential and commercial structures, as well as on turf and landscaping. Onslaught FastCap Spider & Scorpion Insecticide may be sprayed on any surface that will not be stained by water. DO NOT use this as a fogger or apply it as a space spray. Injector application equipment that delivers low volume treatments may be used to make crack and crevice injections or spot and general surface treatments.

Spiders, scorpions and other listed crawling insects Indoors:

Apply as a course, wet spray to surfaces where these pests are normally found. Treat floors, baseboards, around doors and windows, in attics, crawl spaces, eaves, corners, closets, walls, utility pipes, storage areas, and all cracks and crevices. Treat underneath sinks, dishwashers, refrigerators, stoves, the underside of shelves, drawers, cabinets, areas behind pipes, and in all places where these insects shelter. Contact as many insects as possible with direct spray. Repeat applications as needed, but do not exceed more than one (1) application every seven (7) days.

Mixing tip. Shake Onslaught FastCap bottle well prior to mixing. Clean spray equipment before using or diluting Onslaught FastCap. For dilution, add half the required water to spray tank, then add the appropriate amount of Onslaught FastCap. Agitate the mixture, and then slowly add the remainder of the water. Agitate the spray thoroughly before using and also occasionally during use to ensure dispersion. If you use a spray filter screen, they should be 50 mesh or larger.

Use Onslaught FastCap as part of an IPM program. Tank mix Onslaught FastCap with an IGR such as NyGuard IGR Concentrate to break the insect growth cycle and control future emerging insect populations. Do not apply Onslaught FastCap as a fog or space spray. Fog first with a product such as Riptide Water-Based Pyrethrin ULV to get the quick knockdown action of the fog followed by a surface application of Onslaught FastCap for residual control.

Rating Snapshot

5 stars   39
4 stars   9
3 stars   2
2 stars   1
1 star   1

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Average Customer Rating
4.5 out of 5 stars (52)

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Most Helpful Customer Reviews
  • 20 of 20 people found this review helpful:

    5 of 5 stars  Initial review on effectiveness vs scorpions
    By Scott in Chandler Az on 03/02/2014
    Verified Purchase

    Main Target Pest- Bark Scorpion I have used Cykick, Cyper WP, Bifen IT, Demand, and suspend polyzone for scorpion control here in AZ. Cyckick seems to be the best so far. I don't have a huge problem with them, but I have found the occasional one indoors. I black light ~ every night once the temp is warm enough at night to monitor activity. I spray onslaught for the first time in mid feb. I went out 1 week later and found a dead one against the cinder block wall. I don't normally see this even with Cykick, so I got lucky or this stuff works well. It is also cheaper than Cykick per finished gallon once the price drop to _ 60/ bottle. I will use until gone and see how well it control scorpions this summer.

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  • 16 of 17 people found this review helpful:

    5 of 5 stars  FAST CAP ROCKS!
    By Wanda in Orlando, FL on 05/23/2013

    I live in an area where pests are common, this product controls them all. Bed bugs, fleas, ants, roaches, wasps, spiders scorpions... I had zero problems since I started using it. This product also lasts a long time, its around much longer than other products I have tried in the past.

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  • 14 of 14 people found this review helpful:

    5 of 5 stars  Works Great!!!! If you have scorpions get it!
    By Dana in Cumming, GA on 09/23/2013
    Verified Purchase

    I would really recommend this product. I got it for spiders & scorpions both inside & outside the house. I've only used inside so far but it works. I don't know if this stuff calls out the scorpions but 3 are dead so far. I didn't even know i had that many scorpions around. I live in a new development in a heavily wooded area so I expected critters, never scorpions though.

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  • 11 of 13 people found this review helpful:

    5 of 5 stars  Great poduct and service!!!
    By Darren in California on 11/16/2012
    Verified Purchase

    Your web site is user friendly and easy to navigate. The cost of your products are at or lower than others sites. I did find a sprayer on another site that was lower and I sent you the link. You then lowered the price and I purchased it along with insecticide. By the way, Onslaught Fastcap Spider Insecticide does what it says it will do!! Great product! Great company! I could'nt ask for a better outcome.

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  • 9 of 9 people found this review helpful:

    5 of 5 stars  EXCELLENT PRODUCT
    By Mike in Reliance, TN on 11/07/2014
    Verified Purchase

    We live in a National Forest surrounded by heavy forest. After years of paying $95+ per regular scheduled visits by a pest control company, we still had scorpions inside of our home. We knew something had to be done better than a local pest control service. After web searching, we came across this company and the product Onslaught. One application of Onslaught (2tbs) per gallon wiped out the scorpions & all other creeping critters! Best pest control product we have purchased. We cancelled our pest control service! We applied Onslaught on fire ants just to see what the results would be...killed them all dead within a few minutes! We highly recommend this product.

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Most Recent Customer Reviews
  • 5 of 5 stars  onslaught fast cap
    By Lance in St Louis, MO on 11/21/2016

    Great products. I have been using onslaught for years, I am a professsional (12 years experience) l licensed through missouri department of Agriculture, can't go wrong with Onslaught(cyno), Nygaurd(pyriproxyfen), Alpine dust(dynotefuran), 221L(lambda-cyhalothrin), 565(pyrithren), baits advion ant and roach(indoxacarb), Demand and Bifenthrin are all products the pro's use, you can avoid signing contracts with pest control companies and save money by using the same products they use

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  • 1 of 5 stars  Too many call backs
    By Josh in Peyton on 11/07/2016

    Initally this product did great with knocking down the noticeable spiders. But it was crap with residual. The call backs on this product has been 100%, thus I've taken this product off my inventory shelves.

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  • 5 of 5 stars  Works very well
    By Stacy in Randolph, NY on 11/07/2016

    Fast Cap works very well for spiders as well as Asian lady beetles. Couldn't believe the pile of dead beetles just a few hrs later. Great product! I will use again!

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  • 5 of 5 stars  Onslaught Fastcap
    By Dp in Hillcountry, TX on 10/26/2016

    We have a weekend home in the Texas Hillcountry that is vacant most weeks and Bark Scorpions have made themselves at home during our absence, we tried the common house insect sprays without much success. Onslaught FastCap(OFC) was recommended by our primary home pest control service tech, he said he heard it was suppose to be effective in controlling spiders & scorpions. Ordered the OFC and have been using it for over (5) months following the recommended coverage inside & outside and spraying every (4) weeks. We also keep the grass perimeter around the house closely mowed and make sure there are no rubbish buildups. For the most part, the problem has diminished; we find less and less dead scorpions upon our return, and rarely see live ones. We recommend this product based on the result, we are ordering another bottle.

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  • 4 of 5 stars  a bit of short from 16oz
    By Azmi in queen creek, az on 10/19/2016
    Verified Purchase

    this is an excellent product. i would like to give it a 5 star rating, but my last purchase was a bit less than 16oz. being so expensive, even a fraction of an ounce matters a great deal.

    Expert Response   Expert response:
    Thank you for your feedback! We are not aware of any shortages that have occurred in FastCap packaging, but please let us know if you ever have concerns about this, or if it appears your product may have leaked in transit. Keep in mind, too, that some product may be in the small measuring cup reservoir from shipping.

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  • 5 of 5 stars  No spiders
    By Pen in Wichita ks on 10/14/2016

    Brushed off webs and that made them all come out. Sprayed foundation an the eves where thy love. Saw a few for two days. After that I haven't seen any. This makes 26 gallons and I used three.

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  • 5 of 5 stars  Perfect solution to my Scorpion problem.
    By Kevin in Henderson, NV on 10/13/2016

    This stuff works great! Recommend by another person that uses it for scorpions. Once dry it is pet and kid safe. You won't see one scorpion, black widow, brown recluse, or anything else. Eventhought the scorpions and spiders seemed to eat everything else. No more ant hills either. I spray about every 3 months to keep the bugs away. I only spray outside very thoroughly and never see anything. Every situation is different so you may need to spay less or more often. Get a UV light to check every month at night for scorpions. They are the strongest pest to kill so they always come back first then I know I need to spray again. But it keeps them away for months when nothing else works. Much cheaper than any pest control guy. And most of the time they won't have the right spray to get scorpions. Thus gets them all!

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  • 2 of 5 stars  Only good on contact
    By Josh in Peyton on 10/07/2016

    Great for initial knock down. But the residual is horrible. I introduced this product with my company a month ago. But the call backs have been off the charts. I shelved this product for now. If I get a call for a serious spider infestation I will use it. But thats only if I can spray the spider directly.

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  • 5 of 5 stars  I love this!!
    By Hilda in Las Vegas Nevada on 10/04/2016

    I bought this one for scorpions in Las Vegas NV don't spend your money on pest control co this work a lot better.

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  • 5 of 5 stars  Fastcap works!
    By Martha in Porterville, Ca. on 07/31/2016

    We bought a new double-wide manufactured home and had it set up during the cold months of winter on vacant land in Porterville, Ca. that had never been disturbed. As soon as the weather warmed up the scorpions moved in, and we were finding 3-4 inside the house every day. I did my research on the specific species of scorpion and their preferred food sources (earwigs), and which pesticides were most effective. Then I sealed the interior of the house where the pipes, waterlines, conduit, vents, windows, etc. provided access. The website DoMyOwnPestControl had lots of extremely helpful advice as well, which I followed. I started the first month with 1oz/gal Fastcap mixed with NyGuard IGR. (The growth regulator being an integral part of the program, applied once every 6 months.) I quite liberally sprayed indoors and out, from roof to ground as well as a good soaking under the house. In the first month I found 2 dying scorpions indoors and with a blacklight searching outside after full dark I spot sprayed about 2 dozen along the foundation. Next month I used the Demon WP insecticide mixed at the higher concentration as directed. Third month I alternated back to the original Fastcap, then DemonWP the fourth month, and this month the Fastcap again. Next month I'll use the Fastcap along with the NyGuard IGR. So far I have had ZERO scorpions, ZERO ticks, ZERO fleas, ZERO spiders or insects of any kind in my home. I see dead water bugs which live in the soil, along with a few dead beetles along the outside of the house along the skirting on occasion, but nothing alive. I now spray monthly inside along floorboards, under appliances, along window frames and under sinks, as well as outside. As long as they sell it I'll use it!!

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Most Helpful Q&A's

02/22/2015 Kagan from Las Vegas

QMixing Instructions
How much water do you mix to this product? Trying to decide if a bottle is enough to spray inside and outside of my house

AYou want to mix 1fl oz Onslaught FastCap Spider and Scorpion Insecticide into one gallon of water. One pint will give you approx. 16000 sq feet. 

13 of 14 people found this answer helpful.
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05/19/2013 L. from Las Vegas, Nevada

QOnslaught versus Demand, Cykick or Cyzmic for Scorpions
To eliminate scorpions, is Onslaught the strongest, most effective insecticide to spray indoors and out? My treatments have included Demand, Cysmic and Cykick CS and Aerosol (aerosol for knockdown and cracks and crevices) and now am hearing about Onslaught FastCap Spider and Scorpion insecticide and wonder if it is stronger or the strongest. My thought is, if I'm spending money on insecticide and investing time to treat my home to ward off these horrible scorpions that I fear, I want the most effective product on the market. I'd rather purchase and concentrate on the best! Thanks.

AThe Onslaught FastCap would definitely be the best option for your needs. It is specifically formulated to better target spiders and scorpions with a more thorough and long lasting coverage for these hard to kill pests. Keep in mind, no matter what product you are using for scorpions, you have to create a wider barrier for them than any other pest around your home. For general insects you would treat with a barrier around the foundation 2 feet up and 2 feet out. With scorpions you should be doing 2-3 feet up and 6-10 feet out on the ground. Also make sure to treat any landscape areas around your home that they would be prone to hiding in ie: mulch, bark, landscape timbers, rocks etc. You can review more information for protecting your home from scorpions in our article on Scorpion Control.

11 of 12 people found this answer helpful.
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10/09/2013 Amy from Alexandria, Va

QIs Onslaught FastCap safe to use in homes with dogs?

AOnslaught FastCap is safe for pets when they enter the areas after the product has dried.

10 of 11 people found this answer helpful.
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06/21/2013 Gary from South Point, Oh

QWhat's the best indoor spray for spiders?
Our church fellowship hall has an increasing amount of spiders and spider eggs. We are in a rural area of Ohio. They don't bother me that much...but a few female members are scared. What do you recommend? Please note we EAT in the fellowship hall.

AThe absolute best indoor/outdoor spider spray is Onslaught Fastcap. This one of a kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. Onslaught FastCap Spider and Scorpion Insecticide can be applied in a number of areas both indoor and outdoor, as well as food areas (see label for complete list).

8 of 9 people found this answer helpful.
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01/28/2014 Michael from Lake Oconee, Ga

QOnslaught FastCap Spider and Scorpion Insecticide vs. Demand CS?
I have had good results with Demand CS for controlling mosquitoes, wasps, dirt doppers and, to a lesser degree, spiders in our outdoor living areas and around the overhangs of our house. It appears from the produce descriptions that the Onslaught FastCap Spider and Scopion product may provide a more targeted control for spiders. Might I see more effective control of spiders around the exterior of the house if I were to use BOTH products (Demand CS and Onslaught) at the same time?

AThese products should not be mixed together. There is no valid reason to mix Demand CS and Onslaught FastCap Spider and Scorpion together.  Demand CS is a synthetic pyrethroid and Onslaught FastCap already contains a synthetic pyrethroid, so there would be nothing to gain by mixing these products together. Making a pesticide too strong can actually backfire. Areas that are treated with this overly concentrated spray will be repellent and insects will simply avoid the treated areas prolonging the infestation.

5 of 6 people found this answer helpful.
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Most Recent Customer Questions

05/08/2016 Raul from Tx

QWill Onslaught FastCap Spider and Scorpion Insecticide kill dog ticks? If so, how many ounces per 25 gallon tank?

A

Onslaught FastCap Spider and Scorpion Insecticide†is labeled for dog ticks. You will mix 1 oz per gallon of water per 1,000 sq ft.

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04/22/2016 Preston from Van Buren, Mo

QWhat is the difference between Onslaught and Onslaught FastCap?
I was looking at killing wasps as well as spiders is there another residual that would work better.

A

The biggest difference between Onslaught FastCap and Onslaught is the Onslaught Fastcap is a one of a kind formulation made of† Exponent brand synergist,†Esfenvalerate, and Prallethrin. It offers an even quicker more intense knockdown.

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04/18/2016 Danielle from North Canton, Oh

QDoes Onslaught FastCap work for centipedes?

A

Yes, Onslaught FastCap is labeled for centipedes along with many other listed pests. You will mix 0.5-1 fl oz per gallon of water per 1,000 sq ft. Please take a few moments to review our treatment article on How to Get Rid of Centipedes for more detailed information on eradicating them.

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02/09/2016 Jal from Scottsdale, Az

QCan I mix up some Onslaught FastCap and use it as needed?

A

Once you mix Onslaught FastCap, you will need to apply/use the mixed solution within 24 hours. Only mix when you are ready to use within that time. The bottle of product in the concentrated form will have a 2-3 year shelf life (if stored away from extreme temperatures) from the date of purchase. Applications of the product are once quarterly to the interior listed areas on the product label and monthly to the exterior of the structure.

1 of 1 people found this answer helpful.
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10/01/2015 Tim from Austin, Tx

QWhat can I spray to treat scorpions and spiders?

A

We would recommend that you apply Onslaught FastCap Spider and Scorpion Insecticide. It is mixed at 1 oz per gallon of water and the pint size bottle will treat 16,000 sq ft for a 30 day residual. It also treats over 200+ insects. You can apply it in a backpack sprayer on the siding, crack and crevices on the interior and exterior, garage etc.

3 of 3 people found this answer helpful.
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08/23/2015 Rich from Worcester, Ma

QWill Onslaught Fastcap Spider and Scorpion Insecticide also work for springtails?

A

Yes, Onslaught FastCap Spider and Scorpion Insecticide is labeled for springtails as well. You will use 1 fl. oz. per gallon of water. Because they are usually a garden pest, keeping springtails outside of your home is the most effective way to keep a large infestation from occurring. The best way to achieve this goal is to treat the exterior of your home with some kind of barrier insecticide. Make sure you spray around the perimeter of your home, windows, doors, etc. where the pests can come inside.

1 of 1 people found this answer helpful.
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07/13/2015 Pam from Mcdonough, Ga

QIs Onslaught FastCap Insecticide the best way to get rid of scorpions?
We find scorpions in our house all the time in various areas. I have a 7mo. old grandchild starting to crawl and a small dog in the house. I can't take a chance on my grandchild being stung by a scorpion.

A

Onslaught FastCap Spider and Scorpion Insecticide would definitely be the best option for your needs. It is specifically formulated to better target spiders and scorpions with a more thorough and long lasting coverage for these hard to kill pests. Keep in mind, no matter what product you are using for scorpions, you have to create a wider barrier for them than any other pest around your home. For general insects you would treat with a barrier around the foundation 2 feet up and 2 feet out. With scorpions you should be doing 2-3 feet up and 6-10 feet out on the ground. You can also spray inside around cracks and crevices, baseboard areas, and potential entry points such as around window and door frames and where plumbing meets the wall.  Also make sure to treat any landscape areas around your home that they would be prone to hiding in, i.e., mulch, bark, landscape timbers, rocks etc. You can review more information for protecting your home from scorpions in our article on Scorpion Control.  

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07/12/2015 Kevin from Mead, Wa

QIs Onslaught FastCap a non-repellent?

A

 No, Onslaught Fastcap is not considered a non-repellent, the active ingredient in Onslaught Fastcap acts as a repellent for ants or termites. If insects do come in contact with the product, they will die. Please follow label for mixing and applying instructions.

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06/24/2015 Kevin from Gilbert,

QOutside temperature where it is applied.
Would extreme summer temperatures 110+ affect how long the product will be effective after mixing and spraying ?

AYes extreme sunlight/temperatures and other outdoor elements will affect how long the product lasts on the surface. The Onslaught is designed to hold up to the outdoor elements a little longer and better than other general insecticides so you should get at least 30 to 60 day residual out of the product after its sprayed. 

4 of 4 people found this answer helpful.
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06/24/2015 Kevin from Gilbert, Az

QWould either Onslaught or Demon be a good alternative Cy Kick CS?
I have used CyKick monthly for about a couple of years. This summer I have found a few scorpions in the house. Are they becoming resistant to CyKick ? Which of these 2 products would be better as an alternative to CyKick.

AIf you have been using the same product for a long time, it would be a good idea to switch. Onslaught Fast Cap would be a good choice.  It contains different active ingredients, including PBO. PBO gives the Fast Cap an extra kick in killing more quickly. It is also microencapsulated like Cy Kick, providing for a longer lasting residual and making it easier for the scorpions to pick up.

4 of 4 people found this answer helpful.
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